Shoe-ornamenting machinery



Dec 25, 1928. 1,696,631

B. w. FREEMAN SHOE ORNAMENTING MACHINERY Filed May 29, 1926 INVENTOR. 57 (Urizezmq Y A TTORNE Y.

Patented Dec. 25, 1928.

s'rares BENJAMIN W. FREEMAN, 0F CINCINNATI, OHIO.

SHOE- OBNAMENTING MACHINERY.

Application filed May 29, 1926. Serial No. 112,708.

My invention relates broadly to shoe ornamenting machines such as are known in the trade as perforating machines, shoe tip presses, cut-out machines and the like, and the invention specifically relates to improvements which are directed toward improving the backing strip feeding mechanism for such machines.

In the art for many years, it has been common to provide machines havingcutting in strumentalities with a backing strip against which the cuttinginstrumentalities hear after passing through the leather or other material which is cut. In one type of cutting machine to which my invention applies a web of backing is intermittently fed in such position with relation to the work to be cut by the machine, that the web will act as a backing and prevent the dies from striking against a metal part of the machine.

It is the object of my invention to provide a means of tensioning the backing web so that during the interval of placing work or positioning the work support, there will be no slack in the sheet which will hinder the view of the work in cutting position if the machine is of the type in which this is possible, and so that the backing web will always be tautly held in position as a backing sheet so as to decrease the likelihood of poor cutting work.

-Referring to the drawings: T-have illustrated a side elevation of one type of cutting machine combined with which I have disclosed a preferred construction for ten sioning the backing web.

Generally indicated at 1 is the machine frame in which is mounted for a reciprocat ing stroke the plunger or platen 2. In this type of cut-out machine, the dies (not shown) are mounted on a bed plate which provides a work support which is movable into and out of work cutting position. The bed plate is indicated at 3, and a piece of work at on the work support. The dies are under the work and the cutting operationconsists in first moving the work support back into vertical alignment with the plunger platen 2 and depressing the platen, which will cause vious cut, so that mechanism is provided for advancing the sheet with each successive operation of the plunger platen. The roll supporting mechanism consists of a spool spindle 6, which supports the roll prior to its unwinding. lhe web passes over a rounded arm 7 extending from'the machine frame. The web then extends through a tensioning device which is mounted on the vertically movable plunger, and consists preferably of a rounded plate 8 and a spring tensioned roller 9, which bears against the web, which passes between the plate and the roller.

The web then passes preferably to a rounded arm 10 which is also mounted on the movable platen. The mounting arrangement for the tension roller in this type of construction discloses an important feature of my invention since in prior practice, as disclosed in Patent No. 783,403 the device which tensioned the web was mounted on the hub of the backing roll support and functioned primarily as a brake for the web hub support, to prevent overfeeding with the result that when the platen. moved downwardly, the web was carried to the position shown in dotted lines, and no definite take back occurred.

This led to one of two diliiculties. If the intermittent feed mechanism took up all the slack caused by the stroke of the plunger, much more backing was used than was neces sary to provide a fresh cutting surface for each stroke. If the feed did not take up the slack, the sagging backing interfered with the work. Either condition was objectionable, and the arrangement practically limited the vertical stroke of the platen to a very small range of movement. My invention in this type of construction consists in the novel arrangement for mounting the tension roll 9 so that it'will always move in co-ordination with the movable platen, and so that there will be no relative change in the position of the web with relation to the platen during the stroke, and any unfed slack which is With' drawn from the spool due to the platen stroke will be backed up between the tension roller,

9 and the spool 6 in which position it will not interefere with either the view of the work on the work support or the tautness of the web under the platen.

For accurately regulating the backing web feed, I have provided a. roll 12 which is mounted in a spring tensioned rocker arm 13, and the web passes between the roll 12 and an intermittently movable feed roll 1 to which intermittent rotation may be provided as indicated by an eccentric 15, which is operatively connected with the main driving shaft of the machine and advances the roller 14 preferably by means of a one way roller clutch engagement. The particular type of clutch used is not shown this part of the assembly forms no part of my invention.

A rewind roll 11 is provided which may be mechanically moved with each stroke through a desired arc of movement. This rewind roll may be operatively connected with the machine in any desired way.

As noted, the most essential feature of my invention is the provision, in a shoe ornamenting machine, for means for keeping the web which acts as backing for the cutting instrumentalities free and clear of the work when moved into cutting position during the interval that the work is positioned, without requiring such an intern'iit-tent feed as will cause undue waste of paper. Other means will occur to those skilled in the art for accomplishing this same purpose, the preferred arrangement which I have disclosed, being only one of many ways which I have applied to the particular construction of machine shown. One such arrangement which would accomplish the same purpose would be the provision, in a. machine having the tension roller 9 in the position of the arm 7, and attached to the machine frame, of a spring tensioned roller, either between the roller 9 and the arm 10, orbetween the arm 10 and the roller 14. Such a roller would move the slack in the backing sheet away from position underneath the platen and keep the backing sheet clear of the work.

In view of the practicability of providing cutting machines with similar arrangements which will avoid sagging of the backing so as to interfere with the work, it will now be possible to provide a much greater range of movement of the plunger platen. In operating machine by placing work directly in cutting position without moving the work support, and on machines which do not have a slidable work support, the provision of greater clearance will be of great benefit in enabling the more accurate positioning of the work with relation to the cutting instrumentalities.

The range of movement of the platen is greater than the range of movement of the backing web. The backing web, with the downward movement of the platen, is carried along with it. Upon the return stroke of the platen, however, the backing does not go all the way back as some of it has been drawn into the machine by the intermittent feed. Consequently the tensioning device must also have a greater range of movement than the web, as it is carried by the platen.

The idea and method in this type of machine of preventing the backing from interfering with the work, regardless of the backing feed or the stroke of the plunger, is new, and I claim the same broadly.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is 1. In combination with a shoe ornamenting machine having cutting instrumentali ties, having a reciprocating platen and having work receiving space therebetween, a backing web, a support on which said web is mounted, means for advancing said web with such relation to said work receiving space as to provide a fresh backing surface for the cutting instrumentalities in each successive cutting operation, and. means effective only during the return stroke of said platen for transposing from said work space to a ,posi tion clear of the work the excess of said web carried into said work space by the downward movement of said platen.

2. In combination with a shoe ornamenting machine having cut-ting instrumentalities, having a reciprocating platen and hav ing work receiving spaces therebetween, a hub support, a backing web mounted on said support, means for advancing said web with such relation to said work receiving space as to provide a fresh backing surface for the cutting inst-ruinentalities in each successive cutting operation, and means effective only during the return stroke of said platen for transposing from said work space, to a posi tion clear of the work the excess of said web carried into said work space by the downward movement of said platen, said means comprising a member having a range of movementat least equivalent to the dilfcrence between the movement of the platen and the intermittent feeding movement of the web.

3. In a shoe cutting machine having work supporting means, a support for a supply of backing, reciprocating pressure implying means, cutting instrumentalit-ies co-operating therewith, movable backing interposed in a wor: space between the pressure applying means and the cutting instrumentalities, an intermittent feed for said backing, means effective only during the return stroke of said pressure means for transposin the excess of said backing formed in said work space bv the downward stroke of said pressure apply mg means, said means adapted to move. said excess backing clear of work in said interposed position.

4. Ina shoe cutting machine having work supporting means, a support for supplv of backing, re clprocating pressure applving means, cutting lnstrumentalities CO-Oljlfltng therewith, movable backing interposed n a work space bet-ween the pressure apply- 1ng means and the cutting instrumentalit-ies. an intermittent feed for said backin means effective only during the return st-rolde of said pressure means for transposing the excess lll) of said backing formed in said work space by the downward stroke of said pressure applying means, said means adapted to move said excess backing clear of work in said int-erposed position prior to the interval of positioning the work,

5. In a shoe cutting machine having work supporting means, a support for a supply of backing, reciprocating pressure applying means, cutting lnstrumentalities co-operating therewith, movable backing interposed in a work space between the pressure applying means and the cutting instrun'ientalities, an intermittent feed for said backing, means effective only during the return stroke of said. pressure means for transposing the excess of said backing formed in said work space, said means adapted to move said excess backing clear of work in said interposed position prior to the interval of moving the work into cutting position, said last named means being actuable independently of said supply support and said intermittent feed.

6. In a shoe cutting machine having work supporting means, backing supporting means, reciprocating pressure applying means, cutting instrument-alities co-operating therewith, and movable backing interposed between the pressure applying means and the cutting instrumentalities, an intermittent feed for said backing, said pressure applying means provided with means for transposing, to a position clear of the work, hacking in excess of that required for said intern'iittent feed.

7. In a shoe cutting machine having work supporting means,backing supporting means, reciprocating pressure applying means, cutting instrumentalities co -operating therewith, backing interposed in a work space therebetween, means for moving said back ing, which movement is limited so as to provide a minimum fresh backing surface notwithstanding the greater range of movement of said pressure applying means, and means timed with the reciprocating movement of said pressure means for intermittently transposing, to a position clear of the work, the difference from. said work space between the backing moved by the pressure applying means and the minimum noted.

8. in ashoe cutting machine having work supporting means,backi.ng supporting means, reciprocating pressure applying means, cutting instrumentalities co-operating therewith, backing interposed in a work space therebetween, means for moving said backing, which movement is limited so as to provide a minimum fresh backing surface not withstanding the greater range of movement of said pressure applying means, and means timed with the return stroke of said pressure means for transposing the difference between the backing moved by the pressure applying means and the minimum noted from said the difference between the backing moved by the pressure applying means and'the mini- -m um noted from a position in which it would interfere with the work during the interval of moving the work into cutting position, said last named means independent of said backing supporting means.

10. In combination with a backing web feeding device in a shoe cutting machine and a web fed thereby, a web clamping member movable with relation to said web and bearing against said web continuously, said cutting machine having a movable work engaging platen, and said member being carried by said platen.

11. In a shoe cutting machine having a movable plunger, a work support, cutting instrume ntalities, a web, means for feeding said web between the plunger and the cutting instruinentalities, and a member operative in conjunction with the plunger for carrying the web away from the cutting instrumentalities with each plunger stroke, whereby sagging of the web under said plunger is prevented.

12. In a. shoe cutting machine having movable work supporting means, a support for a supply of backing, pressure applying means, cutting instrumentalities co-operating therewith, movable backing interposed in a work space between the pressure applying means and the cutting instrumentalities, said pressure applying means displacing backing in excess of that required to provide a. proper cutting surface, means independent of the support and moving in time with the return stroke of said pressure means for intermittently transposing the excess backing so it will be clear of the work insaid work space during the interval of moving the work into cutting position.

13. In combination with a backing web feeding device in a shoe cutting machine, and a web fed thereby, means movable with relation to said web and bearing against said web continuously, said cutting machine having a movable work engaging platen, and said means operatively connected with said platen for frictionally clamping said web against said platen.

BENJAMIN w. FREEMAN. 

